After updating theme and plugins, there are some strange categorie-images in the shop: http://sani-design.nl/winkel/ (first 6 products)
Also there is all of a sudden the “uncategorised” in the sidebar.
WooCommerce 3.3 has some major issues – just check the plugin page, so much so that it isn’t available anymore at this time. You need to downgrade woocommerce to 3.2.6 version.
Also, before update any plugin you need to be sure that theme and other plugins that you use are compatible with the new version.